Alexandrov, S., and A. Pirumov. “A Generalization of Orowan’s Approach for Plane Strain Rolling to Axisymmetric Extrusion and Drawing”. Advanced Technologies and Materials, vol. 35, no. 1-2, Dec. 2010, pp. 25-34, https://jged.uns.ac.rs/index.php/atm/article/view/jtp.2010.35.1-2.3.